When I upgraded my home server from Debian 7 (wheezy) to 8 (jessie), my installation of the Prosody Jabber chat server broke. Specifically, my chat client would no longer connect, saying SSL was not supported on the server, and prosody complained about SSL support not being available whenever I ran prosodyctl. First I'll show the diagnostic information, then the fix and explanation (spoiler: downgrade lua-socket!), then the new diagnostic output.

The Tor packages in the Debian (and Ubuntu) respositories are not up-to-date. This is dangerous, since people do rely on them for strong anonymity, even though the package warns them not to do so (it's still the best out there.) To get the latest stable version, you'll have to add another repository to your sources.list file and set your system to trust it.